CN105485011A - Self-lubricating double sealing structure for drive end of roots pump - Google Patents
Self-lubricating double sealing structure for drive end of roots pump Download PDFInfo
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- CN105485011A CN105485011A CN201510339944.6A CN201510339944A CN105485011A CN 105485011 A CN105485011 A CN 105485011A CN 201510339944 A CN201510339944 A CN 201510339944A CN 105485011 A CN105485011 A CN 105485011A
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- sealing
- axle sleeve
- stationary ring
- oil
- lip
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Abstract
The invention discloses a self-lubricating double sealing structure for a drive end of a roots pump. According to the invention, a sealing shaft sleeve with a sealing shaft sleeve O-shaped ring sleeves one side close to a gear or an oil flinger, of a drive shaft; a lip-shaped sealing element sleeves outside one side of the sealing shaft sleeve; a mechanical sealing assembly sleeves outside the other side of the sealing shaft sleeve; the mechanical sealing assembly is composed of a movable ring and a static ring, wherein the end surface of one side of the static ring is abutted against the end surface of one side of the lip-shaped sealing element; the movable ring in the mechanical sealing assembly is inlaid in the surface of a drive shaft sleeve; and an oil film layer is formed at a friction surface between the end surface of one side of the movable ring and the end surface of the other side of the static ring. The sealing structure overcomes the shortages of low differential pressure resistance, low vacuum degree stability and no dust resistance of the existing sealing structure adopting mechanical sealing by virtue of lip-shaped sealing; and meanwhile, lubrication of circulation oil for the mechanical sealing is realized by virtue of oil in an oil tank, and the traditional manner of supplying oil independently by a small oil cup is cancelled.
Description
Technical field
The present invention relates to the technical field of Roots pump drive end sealing system, specifically a kind of selflubricating double sealing structure for Roots pump drive end, particularly its mechanical connecting structure.
Background technique
At present, the Seal Design of Roots pump drive end is generally adopt outside framework oil seal, mechanical seal or the hermetically sealed form of plug-in type motor.
Outside framework oil seal is adopted to be place two lip seal at the two ends of a section of live axle, centre lubricating cup is full of lubricant oil, when live axle High Rotation Speed time, the sealing lip that standing motionless lip seal utilization contacts with live axle and the sealing oil film that lubricant oil is formed realize the clearance seal of rotatingshaft and static junction surface.Main material due to outside framework oil seal is rubber, has wearing and tearing very fast when live axle runs up, working life short and heat-resisting difference defect.Mechanical seal is adopted to be settle a rotating ring on the driving shaft, rotate along with axle and rotate, junction surface settles a stationary ring, do not rotate with rotatingshaft, stationary ring rubbing surface and rotating ring rubbing surface contact when rotatingshaft high speed rotating, and form one deck oil film in both rubbing surfaces, thus form sealing.Although the sealing effect of mechanical seal and heat resistance better than outside framework oil seal, also there is not resistance to pressure reduction, degree of vacuum is unstable, not the shortcoming such as resistance to dust.
Summary of the invention
The object of the present invention is to provide a kind of selflubricating double sealing structure for Roots pump drive end, outside single mechanical seal, install a lip envelope additional, solve the resistance to differential pressure of existing use mechanical seal poor, vacustat is poor, the defect of not resistance to dust.
To achieve these goals, technological scheme of the present invention is: a kind of selflubricating double sealing structure for Roots pump drive end, it comprises live axle, it is characterized in that: described live axle is socketed with one with the sealing axle sleeve of sealing axle sleeve O type circle near gear or disc side place, sealing axle sleeve side outer cover is connected to lip envelope seat, in lip envelope seat, the lip packing matched with sealing axle sleeve is installed, sealing axle sleeve opposite side outer cover is connected to mechanical sealing assembly, this mechanical sealing assembly is made up of a rotating ring and a stationary ring, wherein stationary ring is arranged in lip envelope seat, one side end face of stationary ring props up a side end face of lip packing, lip packing other end props up end cap, rotating ring in described mechanical sealing assembly is embedded in propeller shaft sleeve surface, rubbing surface place between rotating ring one side end face and stationary ring opposite side end face forms oil lamella, the end sleeve of sealing axle sleeve opposite side is connected to a machine envelope stop collar, the inner side end of this machine envelope stop collar props up rotating ring opposite side end face, this machine envelope stop collar outer cover is connected to oil blocking cover.
The invention discloses a kind of selflubricating double sealing structure for Roots pump drive end, utilize the resistance to differential pressure of lip seal existing use mechanical seal poor, vacustat is poor, the defect of not resistance to dust.Utilize the oil in fuel tank to realize the circulating oil lubrication of mechanical seal simultaneously, cancel traditional independent fuel feeding of little lubricating cup.Care and maintenance is simpler and easy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Figure comprises:
Live axle 1,
Sealing axle sleeve O type circle 2,
Sealing axle sleeve 3,
Lip packing 4,
Rotating ring 5,
Stationary ring 6,
Machine envelope stop collar 7,
Oil blocking cover 8,
Lip envelope seat 9,
End cap 10,
Sealing gland O type circle 11,
Spring 12.
Embodiment
With reference to the accompanying drawings, the present invention is described further.
The present invention is a kind of selflubricating double sealing structure for Roots pump drive end, as shown in fig. 1, it mainly comprises live axle 1, it is different from prior art and is: described live axle 1 is socketed with one with the sealing axle sleeve 3 of sealing axle sleeve O type circle 2 near gear or disc side place, sealing axle sleeve 3 side outer cover is connected to lip envelope seat 9, in lip envelope seat 9, the lip packing 4 matched with sealing axle sleeve 3 is installed, sealing axle sleeve 3 opposite side outer cover is connected to mechanical sealing assembly, this mechanical sealing assembly is made up of a rotating ring 5 and a stationary ring 6, wherein stationary ring 6 is arranged in lip envelope seat 9, one side end face of stationary ring 6 props up a side end face of lip packing 4, rotating ring 5 in described mechanical sealing assembly is embedded in propeller shaft sleeve 1 surface, rubbing surface place between rotating ring 5 one side end face and stationary ring 6 opposite side end face forms oil lamella, the end sleeve of sealing axle sleeve 3 opposite side is connected to a machine envelope stop collar 7, the inner side end of this machine envelope stop collar 7 props up rotating ring 5 opposite side end face, this machine envelope stop collar 7 outer cover is connected to oil blocking cover 8, lip packing 4 other end props up end cap 10, sealing gland O type circle 11 is provided with between above-mentioned sealing gland and end cap.Lip packing 4 contacts with the axle sleeve on live axle, plays the effect of sealing.
In the specific implementation, two sealing axle sleeve O type circles 2 are provided with between described sealing axle sleeve 3 and live axle 1.Described stationary ring 6 is fixed in lip envelope seat 9, and stationary ring 6 offers oil film groove towards rotating ring direction, rotating ring 5 comprises and the axle sleeve auxiliary section of sealing axle sleeve 3 close contact and the stationary ring auxiliary section of matching with stationary ring 6, inwall and the sealing axle sleeve 3 of stationary ring auxiliary section are provided with gap, stationary ring auxiliary section offers oil film groove towards stationary ring direction, be connected by the connecting part of an oblique setting between axle sleeve auxiliary section and stationary ring auxiliary section, the inner and outer wall of described connecting part is provided with an asymmetric arc-shaped recess portion, oil lamella is formed between the oil film groove of stationary ring and the oil film groove of rotating ring.Spring 12 is arranged with outside described rotating ring 5.
In the specific implementation, machine envelope stop collar 7 and mechanical sealing assembly constitute can the assembling mode that puts in place of disposable clamping, has high reliability, the mechanical seal assembly characteristic of easy installation.
In the specific implementation, lip envelope seat and lip packing constitute extra sealing configuration makes mechanical seal inside and outside differential pressure balance, vacustat, and can prevent dust from causing damage to machinery.
In the specific implementation, this machine envelope stop collar 7 outer cover is connected to oil blocking cover 8, arranges collecting cover above disc, and it is the device of mechanical seal circulation fuel feeding automatically that oil blocking cover 8 and collecting cover constitute, and no longer needs the independent fuel feeding of little lubricating cup.By disc, the lubricant oil in oil groove is splash, collected by the collecting cover above put and splash that to fall lower part after rise oily, flow into the seal oil chamber of mechanical seal by pipeline, and mechanical seal oil pocket and oil groove non-fully seal, have gap, lubricant oil can get back to oil groove by this gap again.
More than show and describe basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. the selflubricating double sealing structure for Roots pump drive end, it comprises live axle, it is characterized in that: described live axle is socketed with one with the sealing axle sleeve of sealing axle sleeve O type circle near gear or disc side place, sealing axle sleeve side outer cover is connected to lip envelope seat, in lip envelope seat, the lip packing matched with sealing axle sleeve is installed, sealing axle sleeve opposite side outer cover is connected to mechanical sealing assembly, this mechanical sealing assembly is made up of a rotating ring and a stationary ring, wherein stationary ring is arranged in lip envelope seat, one side end face of stationary ring props up a side end face of lip packing, lip packing other end props up end cap, rotating ring in described mechanical sealing assembly is embedded in propeller shaft sleeve surface, rubbing surface place between rotating ring one side end face and stationary ring opposite side end face forms oil lamella, the end sleeve of sealing axle sleeve opposite side is connected to a machine envelope stop collar, the inner side end of this machine envelope stop collar props up rotating ring opposite side end face, this machine envelope stop collar outer cover is connected to oil blocking cover.
2. a kind of selflubricating double sealing structure for Roots pump drive end according to claim 1, is characterized in that: be provided with two sealing axle sleeve O type circles between described sealing axle sleeve and live axle.
3. a kind of selflubricating double sealing structure for Roots pump drive end according to claim 1, it is characterized in that: described stationary ring is fixed in lip envelope seat, and stationary ring offers oil film groove towards rotating ring direction, rotating ring comprises and the axle sleeve auxiliary section of sealing axle sleeve close contact and the stationary ring auxiliary section of matching with stationary ring, inwall and the sealing axle sleeve of stationary ring auxiliary section are provided with gap, stationary ring auxiliary section offers oil film groove towards stationary ring direction, be connected by the connecting part of an oblique setting between axle sleeve auxiliary section and stationary ring auxiliary section, the inner and outer wall of described connecting part is provided with an asymmetric arc-shaped recess portion, oil lamella is formed between the oil film groove of stationary ring and the oil film groove of rotating ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339944.6A CN105485011B (en) | 2015-06-18 | 2015-06-18 | A kind of self-lubricating double sealing structure for lobe pump drive end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339944.6A CN105485011B (en) | 2015-06-18 | 2015-06-18 | A kind of self-lubricating double sealing structure for lobe pump drive end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485011A true CN105485011A (en) | 2016-04-13 |
| CN105485011B CN105485011B (en) | 2017-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510339944.6A Active CN105485011B (en) | 2015-06-18 | 2015-06-18 | A kind of self-lubricating double sealing structure for lobe pump drive end |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19963170A1 (en) * | 1999-12-27 | 2001-06-28 | Leybold Vakuum Gmbh | Vacuum pump with shaft sealant |
| US20070290449A1 (en) * | 2006-06-15 | 2007-12-20 | Plattco Corporation | Mechanical shaft seal |
| CN201696341U (en) * | 2010-05-19 | 2011-01-05 | 宁波伏尔肯机械密封件制造有限公司 | Mechanical sealing device |
| CN202579290U (en) * | 2012-05-20 | 2012-12-05 | 杭州青华实业有限公司 | Single mechanical sealing device for sewage pump |
| CN202629079U (en) * | 2012-03-20 | 2012-12-26 | 江苏永盛流体科技有限公司 | Sealing element for stirrer |
| CN103075347A (en) * | 2013-01-19 | 2013-05-01 | 上海零澜机械科技有限公司 | Gap self-adaptive mixed type dual-sealing structure for roots pump drive end |
| CN205136017U (en) * | 2015-06-18 | 2016-04-06 | 上海伊莱茨真空技术有限公司 | A self -lubricating double seal structure for lobe pump drive end |
-
2015
- 2015-06-18 CN CN201510339944.6A patent/CN105485011B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19963170A1 (en) * | 1999-12-27 | 2001-06-28 | Leybold Vakuum Gmbh | Vacuum pump with shaft sealant |
| US20070290449A1 (en) * | 2006-06-15 | 2007-12-20 | Plattco Corporation | Mechanical shaft seal |
| CN201696341U (en) * | 2010-05-19 | 2011-01-05 | 宁波伏尔肯机械密封件制造有限公司 | Mechanical sealing device |
| CN202629079U (en) * | 2012-03-20 | 2012-12-26 | 江苏永盛流体科技有限公司 | Sealing element for stirrer |
| CN202579290U (en) * | 2012-05-20 | 2012-12-05 | 杭州青华实业有限公司 | Single mechanical sealing device for sewage pump |
| CN103075347A (en) * | 2013-01-19 | 2013-05-01 | 上海零澜机械科技有限公司 | Gap self-adaptive mixed type dual-sealing structure for roots pump drive end |
| CN205136017U (en) * | 2015-06-18 | 2016-04-06 | 上海伊莱茨真空技术有限公司 | A self -lubricating double seal structure for lobe pump drive end |
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| Publication number | Publication date |
|---|---|
| CN105485011B (en) | 2017-10-10 |
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